I know what you mean, it's the same here in Europe...I don0t know why, but in the US online stores I see the same camera about 20% cheaper, or more!

I think it's at least to an extent due to VAT/sales tax, isn't it? I'm not entirely sure now, but I've gathered that US online stores don't necessarily show the prices including sales tax, as that can vary by the state of the buyer, while in Europe the 17-25% VAT, depending on the country, is already added to the price. (Also, I've understood that sales tax in the US is generally somewhat lower.)

It certainly makes a difference that can easily lead to hundreds of dollars in price.